Improvement in grate-bars for furnaces



L. P. RIDER.

GRATE-BARS' FOR FURNACES.

Patented Jan.23,187'7.

U IT D STATES To all whom it may concern:

LEMAN P. monitor PITTSBU-RG, PENNSYLVANIA.

IMPROVEMENT IN GR'ATE-BARS FOR FURNACES.

Specification forming part of Letters Pat-ent No. 186,436, dated January23,1877; application filed September 23, 1876.

Be it known that I, LEMAN P- RIDER, of Pittsburg, State of Pennsylvania,have invented a new and useful Improvement in Grates for Furnaces; and Ido hereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

My invention relates to an improvement in grates for furnaces; andconsists-in thepeculiar construction, suspension, and arrangement of thegrate-bars with relation to the vertical walls of thefire-chamber of thefurnace, and alsoin the means and manner of manipulating the saidgrate-bars with relation to each other and the'body of the burning fuelresting on them, the whole being so constructed, arranged, and operatingthat the necessary and proper quantity of air is admitted under, in-

to, and around the burning fuel, thereby securing a uniform and completeconsumption of it, and generating an intense heat by the propercommingling of atmospheric air with the gases evolved by the burningfuel, and the formation of clinkers prevented, and the Walls of thefire-chamber protected.

V To enable others skilled in the art with which my invention is mostnearly connected to make and use it, I will proceed to describeitsconstruction and operation.

In the accompanying drawings, which form part of my specification,Figure l is an inverted view of the grate. Fig. 2 is a vertical sectionof the grate and furnace at line y of Fig. 1. Fig. 3 is a side view'ofthe grate-bar. Fig. 4 is an end view of the same. Fig. 5 is a transversesection of the same. Fig. 6 is a top view or plan of the crank-shaftsupon which the grate-bars are suspended in the firechamber of thefurnace.

In the accompanying drawings, Arepresents the furnace; B, thegrate-bars, which are constructed in two sections, and hinged togetherat D. The sections G of the gratebars are provided with openings,through which passes a shaft, 0, the ends of which are supported andheld in position by a support,

,which can be moved at will for dropping the'sections G of the bars B,for the purpose in the county of Allegheny and.

of cleaning out the fire-chamber, or for removingthe refuse ofcombustion. The grate-bars B are provided with recesses g h, into whichare placed the wrist-pins t of the crank-shafts jj, which shafts'are'pivoted in suitable bearings in the side walls of the furnace. Fromthe crank-shafts j j project downward arms k, to whichis pivoted aconnectingrod, l, to the outer end of which is attached anoperating-lever, m. That part of the crank-shafts j 7 j which is betweenthe grate-bars, or between the openings formed by them, is beveled onthe upper surface, for the purpose of preventing the cinders or othermatter which pass down between the bars from lodging and remaining onthe shafts j j, which would, if allowed to remain on the shafts andbetween the grate-bars, prevent the proper inflow of air to the burningfuel resting upon the bars.

I wish it to be observed that by the arrangement of the crank-shafts j jwith relation to the grate-bars B and the sections 0, hinged to them,the operator imparting to the lever Z a reciprocating motion, the bars Bwill be elevated alternately and vertically, their upper surfaceretaining a horizontal plane, while the sections 0 will also be movedalternately, but at an acute angle to a horizontal plane. By thispeculiar movement of the bars B and sections 0 the under surface of theburning fuel becomes corrugated, so as to form a series of channels forthe infiowing air, and by the sections 0 being moved at an acute angleto the plane of the bars B the fuel is parted, forming a series ofcrevices or vents, which are at right angles to the corrugationsformedby the vertical and horizontal movements of the bars B, therebycausing a full and free flow of air into and among the burning particlesof fuel, and at the same time allowing the refuse of combustion to-dropdown from among the burning fuel, thus giving a full and free ingressfor the air, and allowing it to act unimpeded on the burning fuel, andalso to commingle with the gases evolved therefrom, whereby completecombustion fol-.

lows, and an intense heat is generated.

By reference to Fig. 1 it will be seen that an open space is formedbetween the walls of the furnace and the grate-bars. By this arrangementa' current of air is made to pass up PATENT mirror fore described, theformation of clinkers is prevented, for the matter which usually formsthe clinker flows down in the form of a glossy substance, which, lodgingon the surface of the grate, is, by the peculiar movement of the bar,broken into small pieces, which drop down into the ash-pit of thefurnace.

Having thus described my improvement, what I claim as of my inventionis- 1. A grate-bar consisting of two sections, B O, the latter beinghinged to the former, and capable of being turned downward withoutaffecting the horizontal position of the section B, substantially as setforth.

2. The combination of the sections B 0, con nected by links D and thecrank-shafts j j, supporting them, and arranged with relation to thewalls of the furnace, and operating the section B, as specified.

' L. P. RIDER.

Witnesses:

A. O. JOHNSTON, EDWIN SPRAGUE.

